WCu Copper Copper Tungsten Alloy Submerged arc welding contact tips
with 80W20Cu
Tungsten Copper :
Tungsten-Copper alloy is the composite of Tungsten and Copper,
which own the excellent performances of Tungsten and Copper, such
as heat-resistant, ablate-resistant, high-intensity, excellent
thermal and electrical conductivity. It is easy to be machined. It
is used widely in such industries as engine, electrical power,
electron, metallurgy, spaceflight and aviation. Using CIP
formation, sintered tungsten skeleton and infiltrating copper
(silver) technology, large size and special shape products of
tungsten-copper (silver) composites with 6-90 percent of copper are
produced, such as electric contacts, electrode, refractory parts,
heat sinks and parts of rocket, We can also produce sheet material,
tubing, plate and other small products by mould pressing, extrusion
pressing and MIM.
| content(%wt.) | density(g/cm3) | conductivity(%IACS) | hardness(HRB) | RWMA |
| Cr: 0.5-1.5% Zr:0.05-0.25% Cu:balance | 8.9 | 80 | 80 | class 2 |
| content | Density | Hardness | Conductivity | Class |
| W75Cu25 | 14.5 | 90 | 38 | 11 |
| W80Cu20 | 15.2 | 98 | 34 | 12 |
Advantages:
1. High thermal conductivity
2. Excellent hermeticity
3. Excellent flatness, surface finish, and size control
4. Semi-finished or finished (Ni/Au plated) products available
5. Low porosity
Product Properties:
| Grade | W Content | Density g/cm3 | Coefficient of thermal Expansion ×10-6 (20℃) | Thermal conductivity W/(M·K) |
| 90WCu | 90±2% | 17.0 | 6.5 | 180 (25℃) /176 (100℃) |
| 85WCu | 85±2% | 16.4 | 7.2 | 190 (25℃) / 183 (100℃) |
| 80WCu | 80±2% | 15.65 | 8.3 | 200 (25℃) / 197 (100℃) |
| 75WCu | 75±2% | 14.9 | 9.0 | 230 (25℃) / 220 (100℃) |
| 50WCu | 50±2% | 12.2 | 12.5 | 340 (25℃) / 310 (100℃) |
Application:
They are extensively used as thermal mounting plates, chip
carriers, tungsten copper flanges, and frames for RF, light
emitting diodes and detectors, laser diode packages like pulse,
single emitter, bars and complex carriers for optoelectronics
amplifiers, receivers, transmitters, tunable lasers, etc.
